速度400km/h高速铁路列车风作用的数值模拟研究  

Numerical Simulation Study on Train-induced Wind Load of 400 km/h High-speed Railway

作　　者：向活跃[1,2] 庞鹏飞 胡浩 李永乐[1,2] Xiang Huoyue;Pang Pengfei;Hu Hao;Li Yongle(Key Laboratory of Railway Industry on Disaster Prevention and Mitigation for Railways in Special and Complex Mountains,Southwest Jiaotong,University,Sichuan,Chengdu 610031,China;Wind Engineering Key Laboratory of Sichuan Province,Sichuan,Chengdu 610031,China)

机构地区：[1]西南交通大学复杂艰险山区铁路防灾减灾铁路行业重点实验室,四川成都610031 [2]风工程四川省重点实验室,四川成都610031

出　　处：《铁道技术标准（中英文）》2023年第6期10-16,共7页Railway Technical Standard(Chinese & English)

基　　金：国家自然科学基金(51978589)。

摘　　要：为研究速度400 km/h高速铁路列车风的荷载取值,基于动网格和滑移网格组合的方法,对高速铁路列车风效应进行三维数值模拟,分析列车周围不同距离、高度处的压力分布规律,考查不同车速下线周声屏障的气动力变化规律。结果表明,测点距列车距离越远,列车风压力越小,同一测点的列车风压力与车速平方成正比,线周声屏障的列车风压力也有类似的规律。对于速度400 km/h高速铁路列车风的荷载,可在现行规范中350 km/h列车风的荷载基础上,增大31%后作为设计值。This study aims to investigate the value of train-induced wind load of 400 km/h high-speed railway.A three-dimensional numerical simulation of high-speed railway train wind effect was carried out based on a combination of dynamic grid and sliding grid techniques.This study analyzed the pressure distribution law at different distances and heights around the train,and examined the variation law of aerodynamic forces on the noise barrier around the lane at different speeds.The results indicate that the train wind pressure decreases as the measuring point moves farther from the train.The train wind pressure at a given measuring point is proportional to the square of the train speed,and a similar relationship is observed for the train wind pressure on the noise barrier.For the train-induced wind load of 400 km/h high-speed railway,the design value can be increased by 31% based on the 350 km/h train wind load in the current specification.

关 键 词：列车风 400 km/h高速铁路 数值模拟 声屏障 

分 类 号：U270.11[机械工程—车辆工程]